release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/scsi/bfa/loop.c

   1 /*
   2  * Copyright (c) 2005-2009 Brocade Communications Systems, Inc.
   3  * All rights reserved
   4  * www.brocade.com
   5  *
   6  * Linux driver for Brocade Fibre Channel Host Bus Adapter.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU General Public License (GPL) Version 2 as
  10  * published by the Free Software Foundation
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  */
  17
  18 /**
  19  *  port_loop.c vport private loop implementation.
  20  */
  21 #include <bfa.h>
  22 #include <bfa_svc.h>
  23 #include "fcs_lport.h"
  24 #include "fcs_rport.h"
  25 #include "fcs_trcmod.h"
  26 #include "lport_priv.h"
  27
  28 BFA_TRC_FILE(FCS, LOOP);
  29
  30 /**
  31  *   ALPA to LIXA bitmap mapping
  32  *
  33  *   ALPA 0x00 (Word 0, Bit 30) is invalid for N_Ports. Also Word 0 Bit 31
  34  * is for L_bit (login required) and is filled as ALPA 0x00 here.
  35  */
  36 static const u8   port_loop_alpa_map[] = {
  37         0xEF, 0xE8, 0xE4, 0xE2, 0xE1, 0xE0, 0xDC, 0xDA, /* Word 3 Bits 0..7 */
  38         0xD9, 0xD6, 0xD5, 0xD4, 0xD3, 0xD2, 0xD1, 0xCE, /* Word 3 Bits 8..15 */
  39         0xCD, 0xCC, 0xCB, 0xCA, 0xC9, 0xC7, 0xC6, 0xC5, /* Word 3 Bits 16..23 */
  40         0xC3, 0xBC, 0xBA, 0xB9, 0xB6, 0xB5, 0xB4, 0xB3, /* Word 3 Bits 24..31 */
  41
  42         0xB2, 0xB1, 0xAE, 0xAD, 0xAC, 0xAB, 0xAA, 0xA9, /* Word 2 Bits 0..7 */
  43         0xA7, 0xA6, 0xA5, 0xA3, 0x9F, 0x9E, 0x9D, 0x9B, /* Word 2 Bits 8..15 */
  44         0x98, 0x97, 0x90, 0x8F, 0x88, 0x84, 0x82, 0x81, /* Word 2 Bits 16..23 */
  45         0x80, 0x7C, 0x7A, 0x79, 0x76, 0x75, 0x74, 0x73, /* Word 2 Bits 24..31 */
  46
  47         0x72, 0x71, 0x6E, 0x6D, 0x6C, 0x6B, 0x6A, 0x69, /* Word 1 Bits 0..7 */
  48         0x67, 0x66, 0x65, 0x63, 0x5C, 0x5A, 0x59, 0x56, /* Word 1 Bits 8..15 */
  49         0x55, 0x54, 0x53, 0x52, 0x51, 0x4E, 0x4D, 0x4C, /* Word 1 Bits 16..23 */
  50         0x4B, 0x4A, 0x49, 0x47, 0x46, 0x45, 0x43, 0x3C, /* Word 1 Bits 24..31 */
  51
  52         0x3A, 0x39, 0x36, 0x35, 0x34, 0x33, 0x32, 0x31, /* Word 0 Bits 0..7 */
  53         0x2E, 0x2D, 0x2C, 0x2B, 0x2A, 0x29, 0x27, 0x26, /* Word 0 Bits 8..15 */
  54         0x25, 0x23, 0x1F, 0x1E, 0x1D, 0x1B, 0x18, 0x17, /* Word 0 Bits 16..23 */
  55         0x10, 0x0F, 0x08, 0x04, 0x02, 0x01, 0x00, 0x00, /* Word 0 Bits 24..31 */
  56 };
  57
  58 /*
  59  * Local Functions
  60  */
  61 static bfa_status_t bfa_fcs_port_loop_send_plogi(struct bfa_fcs_port_s *port,
  62                                         u8 alpa);
  63
  64 static void bfa_fcs_port_loop_plogi_response(void *fcsarg,
  65                                         struct bfa_fcxp_s *fcxp,
  66                                         void *cbarg,
  67                                         bfa_status_t req_status,
  68                                         u32 rsp_len,
  69                                         u32 resid_len,
  70                                         struct fchs_s *rsp_fchs);
  71 /**
  72  *   Called by port to initializar in provate LOOP topology.
  73  */
  74 void
  75 bfa_fcs_port_loop_init(struct bfa_fcs_port_s *port)
  76 {
  77 }
  78
  79 /**
  80  *   Called by port to notify transition to online state.
  81  */
  82 void
  83 bfa_fcs_port_loop_online(struct bfa_fcs_port_s *port)
  84 {
  85
  86         u8         num_alpa = port->port_topo.ploop.num_alpa;
  87         u8        *alpa_pos_map = port->port_topo.ploop.alpa_pos_map;
  88         struct bfa_fcs_rport_s *r_port;
  89         int             ii = 0;
  90
  91         /*
  92          * If the port role is Initiator Mode, create Rports.
  93          */
  94         if (port->port_cfg.roles == BFA_PORT_ROLE_FCP_IM) {
  95                 /*
  96                  * Check if the ALPA positional bitmap is available.
  97                  * if not, we send PLOGI to all possible ALPAs.
  98                  */
  99                 if (num_alpa > 0) {
 100                         for (ii = 0; ii < num_alpa; ii++) {
 101                                 /*
 102                                  * ignore ALPA of bfa port
 103                                  */
 104                                 if (alpa_pos_map[ii] != port->pid) {
 105                                         r_port = bfa_fcs_rport_create(port,
 106                                                 alpa_pos_map[ii]);
 107                                 }
 108                         }
 109                 } else {
 110                         for (ii = 0; ii < MAX_ALPA_COUNT; ii++) {
 111                                 /*
 112                                  * ignore ALPA of bfa port
 113                                  */
 114                                 if ((port_loop_alpa_map[ii] > 0)
 115                                     && (port_loop_alpa_map[ii] != port->pid))
 116                                         bfa_fcs_port_loop_send_plogi(port,
 117                                                 port_loop_alpa_map[ii]);
 118                                 /**TBD */
 119                         }
 120                 }
 121         } else {
 122                 /*
 123                  * TBD Target Mode ??
 124                  */
 125         }
 126
 127 }
 128
 129 /**
 130  *   Called by port to notify transition to offline state.
 131  */
 132 void
 133 bfa_fcs_port_loop_offline(struct bfa_fcs_port_s *port)
 134 {
 135
 136 }
 137
 138 /**
 139  *   Called by port to notify a LIP on the loop.
 140  */
 141 void
 142 bfa_fcs_port_loop_lip(struct bfa_fcs_port_s *port)
 143 {
 144 }
 145
 146 /**
 147  * Local Functions.
 148  */
 149 static bfa_status_t
 150 bfa_fcs_port_loop_send_plogi(struct bfa_fcs_port_s *port, u8 alpa)
 151 {
 152         struct fchs_s          fchs;
 153         struct bfa_fcxp_s *fcxp = NULL;
 154         int             len;
 155
 156         bfa_trc(port->fcs, alpa);
 157
 158         fcxp = bfa_fcxp_alloc(NULL, port->fcs->bfa, 0, 0, NULL, NULL, NULL,
 159                                   NULL);
 160         bfa_assert(fcxp);
 161
 162         len = fc_plogi_build(&fchs, bfa_fcxp_get_reqbuf(fcxp), alpa,
 163                              bfa_fcs_port_get_fcid(port), 0,
 164                              port->port_cfg.pwwn, port->port_cfg.nwwn,
 165                                  bfa_fcport_get_maxfrsize(port->fcs->bfa));
 166
 167         bfa_fcxp_send(fcxp, NULL, port->fabric->vf_id, port->lp_tag, BFA_FALSE,
 168                           FC_CLASS_3, len, &fchs,
 169                           bfa_fcs_port_loop_plogi_response, (void *)port,
 170                           FC_MAX_PDUSZ, FC_RA_TOV);
 171
 172         return BFA_STATUS_OK;
 173 }
 174
 175 /**
 176  *   Called by fcxp to notify the Plogi response
 177  */
 178 static void
 179 bfa_fcs_port_loop_plogi_response(void *fcsarg, struct bfa_fcxp_s *fcxp,
 180                                  void *cbarg, bfa_status_t req_status,
 181                                  u32 rsp_len, u32 resid_len,
 182                                  struct fchs_s *rsp_fchs)
 183 {
 184         struct bfa_fcs_port_s *port = (struct bfa_fcs_port_s *) cbarg;
 185         struct fc_logi_s     *plogi_resp;
 186         struct fc_els_cmd_s   *els_cmd;
 187
 188         bfa_trc(port->fcs, req_status);
 189
 190         /*
 191          * Sanity Checks
 192          */
 193         if (req_status != BFA_STATUS_OK) {
 194                 bfa_trc(port->fcs, req_status);
 195                 /*
 196                  * @todo
 197                  * This could mean that the device with this APLA does not
 198                  * exist on the loop.
 199                  */
 200
 201                 return;
 202         }
 203
 204         els_cmd = (struct fc_els_cmd_s *) BFA_FCXP_RSP_PLD(fcxp);
 205         plogi_resp = (struct fc_logi_s *) els_cmd;
 206
 207         if (els_cmd->els_code == FC_ELS_ACC) {
 208                 bfa_fcs_rport_start(port, rsp_fchs, plogi_resp);
 209         } else {
 210                 bfa_trc(port->fcs, plogi_resp->els_cmd.els_code);
 211                 bfa_assert(0);
 212         }
 213 }